Having the wide application of metal oxides in energy technologies, in recent years, many researchers tried to increase the performance of the PV/T system by using metal oxide-based nanofluids (NFs) as coolants or optical filters or both at the same time. This paper summarizes recent research activities on various metal oxides (Al₂O₃, TiO₂, SiO₂, Fe₃O₄, CuO, ZnO, MgO)-based NFs performance in the PV/T system regarding different significant parameters, e.g., thermal conductivity, volume fraction, mass flowrate, electrical, thermal and overall efficiency, etc. By conducting a comparative study among the metal oxide-based NFs, Al₂O₃/SiO₂-water NFs are mostly used to achieve maximum performance. The Al₂O₃-water NF has a prominent heat transfer feature with a maximum electrical efficiency of 17%, and a maximum temperature reduction of PV module of up to 36.9°C can be achieved by using the Al₂O₃-water NF as a coolant. Additionally, studies suggest that the PV cell’s efficiency of up to 30% can be enhanced by using a solar tracking system. Besides, TiO₂-water NFs have been proved to have the highest thermal efficiency of 86% in the PV/T system, but TiO₂ nanoparticles could be hazardous for human health. As a spectral filter, SiO₂-water NF at a size of 5 nm and a volume fraction of 2% seems to be very favorable for PV/T systems. Studies show that the combined use of NFs as coolants and spectral filters in the PV/T system could provide a higher overall efficiency at a cheaper rate. Finally, the opportunities and challenges of using NFs in PV/T systems are also discussed.

随着金属氧化物在能源技术中的广泛应用，近年来，许多研究人员试图通过使用基于金属氧化物的纳米流体 (NFs) 作为冷却剂或光学过滤器或同时使用两者来提高 PV/T 系统的性能。本文总结了最近在 PV/T 系统中基于各种金属氧化物（Al ₂ O ₃、TiO ₂、SiO ₂、Fe ₃ O ₄、CuO、ZnO、MgO）的 NFs 性能在不同重要参数方面的研究活动，例如，热导率、体积分数、质量流量、电效率、热效率和综合效率等。 通过对基于金属氧化物的 NFs、Al ₂ O ₃进行比较研究/SiO ₂ -water NFs主要用于实现最大性能。Al ₂ O ₃ -water NF具有突出的传热特性，最高电效率为17%，使用Al ₂ O ₃ -water NF可实现光伏组件最高降温36.9°C作为冷却剂。此外，研究表明，使用太阳能跟踪系统可以将 PV 电池的效率提高 30%。此外，TiO ₂ -water NFs 已被证明在 PV/T 系统中具有 86% 的最高热效率，但 TiO ₂纳米颗粒可能对人体健康有害。作为光谱过滤器，SiO ₂尺寸为 5 nm 且体积分数为 2% 的 -water NF 似乎非常有利于 PV/T 系统。研究表明，在 PV/T 系统中结合使用 NF 作为冷却剂和光谱过滤器可以以更便宜的价格提供更高的整体效率。最后，还讨论了在 PV/T 系统中使用 NF 的机遇和挑战。